Display board assembly



FIG. 1 is a front perspective view of a display board assembly of the present invention; and,

FIG. 2 is a front view of the display board assembly of FIG. 1.

The portions of the display board assembly shown in broken lines are for illustrative purposes only and form no part of the claimed design.

The portions of the display board assembly in stippled shading represent a contrast of materials. 

I claim the ornamental design for a display board assembly, as shown and described. 